Means for relieving pressure on top rolls



Feb. 19, 1935. J. c. sTUBB's MEANS FOR RELIEVING PRESSURE ON TOP ROLLS 2Sheets-Sheet 2 Filed NOV. l0, 1933 MN km JAMES C. .5 T0565 Patented Feb.19, 1935 t y MEANS FoaaELIEvING PRESSURE oN 1.

Tor nousr James C. Stubbs, Rockingham, ',N. C. Y Application November10, 193.3,` Seria 1-No.L697;4ii5-. l1V claim. f (o1. 194136) UNITEDSTATES PAT ENT ,OFFICE This invention relates to means for relieving torest on the rolls 12 when theyarn is passed the pressure on the toprolls of spinning frames, therebetween for drawing purposes. These topdrawing frames, slubbers, intermediates, and in rolls are supported forrotation in members 14 fact all types of machinery for preparation orpivoted on rod 15 and saddles 16 and 1'? apply yarn in strand form inwhich the sliver or strand pressure to the top rolls, the pressure beingde- 5 is passed through a series of drawing rolls. rived through astirrup 18, a lever 19 engaging Heretofore, attempts have been made toproa lever hook 20 at one end and a link 21 being vide such a mechanism,but on account of the adjustablyv mounted on the other and penetratcfact that the prevailing type of frame has a broad ing the roll standsupporting rail and having l0 roll stand supporting board or member,there is a weight 22 on the lower end thereof, though in l0 only averysmall space left between the pressure some instances a spring is usedinstead of a levers and the roll stand supporting board, thus weight. Yrendering the placing of a rod with cams there- In any event there is aconstant downward on impracticable. I have solved the difficulty byVpressure exerted on the top rolls 13 by means l5 placing between theroll stand supporting member of the weight `22 or a spring if the springis used 15 and the levers a flat elongated member which lies instead ofa weight. This means that when the fiat on the top surface of the rollstand support machinery is standing idle, that the portions of when notin use and which is pvoted along one the toprolls pressing against thebottom rolls edge thereof, so that when it occupies a substanwill becomeflattened or scarred on account 0I tially vertical position it elevatesthe levers and remaining in this one place for an appreciable 20relieves the pressure from the top rolls. length of time and it is anobject of this inven- It is Well known, that on account of the fact tionto provide means whereby this pressure can that the bottom rolls are ofsteel and have bosses be released when the machine is not in operation.thereon which are fluted, and as the top rolls are On account of thesmall amount of space Y leather covered, cork covered and the like, thatwhich appears between the levers 19 and the roll 25 when the machinesremain idle for an apprestand supporting beam' 10 it is evident that`arod ciable length of time, the leather or cork top rolls with camsthereon could not be used on account will have iiat places or furrowsimpressed therein of lack of space. I therefore, provide, usually whichdamages the rolls and causes them to' be two elongated flattened bars 25and 26 which relegated to the repair shop for recovering. have holesbored therethrough along one edge 30 It is an object of this inventionto provide one thereof which are penetrated by U-bolts 27, which or moreflat bars between the levers and the roll pivotally mount these bars 25and 26 at one edge stand board, with a lever thereon for operatingthereof. I also secure to each of the bars 25 and the same, which leveracts as a stop for the bars 26 an arm or lever 28 or 29, not only formanipwhen they have passed dead center and holds ulating the bars 25 and26 but also for holding 35 them in elevated position. these bars inadjusted position, as it is evident Some of the objects of the inventionhaving that when the bars are raised to their operative been stated,details of the same will appear more position, as shown in the left handportion of fully when taken in connection with the detailed Figure 1 andin Figure 2, that these levers 28 description hereinafter following,when read lin or 29 serve to limit the counter clock-wise move- 40 viewof the accompanying drawings, in whichment of the bars as shown inFigure 2 and holds Figure 1 is a rear elevation of a drawing frame thebars in elevated position because they have and the like showing myinvention applied passed their dead center and therefore theselethereto; y vers 28 and 29, not only serve the purpose of oper- Figure2 is a vertical sectional view taken along ating the flat bars 25 and26, but also hold them the line 2--2 in Figure 1; Y y in elevatedposition.

Figure 3 is a vertical sectional view taken along Another advantage ofthis arrangement is that the line 3-3 in Figure 1. when the bars 25 and26 are not in operative po- Referring more speciiically to the drawingsthe sition they lie flat on the top surface of the roll numeral 10indicates the roll stand supporting stand supporting rail 10 and aretherefore not in 50 beam having mounted thereon a plurality of rollposition to catch lint and are also out of the way stands 11, the rollstands supporting a plurality in case a brush or any other cleaninginstrument of steel rolls 12 and a plurality of top rolls 13 is desiredto be used. Furthermore, in mechanwhich are usually covered with acomposition ical cleaners which are traversed above the masuch asleather, cork and the like and adapted chinery, it is seen that thesebars lying flat oer no resistance to the air drafts which are directeddownwardly onto the machinery while they are in the inoperativeposition.

This inoperative position is shown in the right hand portion of Figure 1and in Figure 3, and when the machines are stopped over-night, or for anappreciable length of time, the operator moves the levers 28 and 29 tothe position shown in the left hand portionof Figure 1 and in Figure 2,and thus the pressure on the top rolls is removed, and the life of thetop rolls is greatly extended.

In the drawings and specification there has been set forth a preferredembodiment of the invention and although specic terms are employed, theyare used in a generic and descriptiveV sense only, and not for purposesofY limitation, the scope of the invention being set forth in theappended claim.

I claim:

In ber preparation machinery having a. roll stand supporting board andltop rolls and levers for applying pressure tothe top rolls, a, at bnrextending beneath a plurality of said levers and disposed between theroll stand supporting board and the levers and normally out of contactwith the levers and occupying a plane parallel to the upper surface ofthe roll stand 'supporting board, means pivotally connecting one edge ofthe Het bar to the roll stand supporting board, an arm secured near theupper edge of the at bar and normally occupying a vertical plane whenpressure is applied to the roll, the free end of the arm engaging thetop surface of the roll stand supporting board when the flat bar ismoved on its pivot past its dead center to elevate the levers,

the pressure on the-levers holding the end o! the arm against the rollstand supporting board.

JAMES C. STUBBS.

